Astrophysical Signatures of Secluded Dark Matter
By M. Pospelov, A. Ritz. 2008
494 citations recorded by the source corpus.
Abstract We analyze the indirect astrophysical signatures of secluded models of WIMP dark matter, characterized by a weak-scale rate for annihilation into light MeV-scale mediators which are metastable to decay into Standard Model states. Such scenarios allow a significant enhancement of the annihilation cross section in the galactic halo relative to its value at freeze-out, particularly when the mediator is light enough for this process to proceed through radiative capture to a metastable ‘WIMP-onium’ bound state. For MeV-scale vector mediators charged under a hidden U ( 1 ) ′ gauge group, the enhanced annihilation rate leads predominantly to a sizable excess positron flux, even in the absence of astrophysical boost factors.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/086702209852fab4e84666f3e3955a374e100a73
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In Astronomy and Astrophysics
- M. Drewes
- A. Ringwald
- M. Shaposhnikov
- Fedor Bezrukov
- Alexey Boyarsky
- Oleg Ruchayskiy
- R. Essig
- J. Redondo
In Nuclear and High Energy Physics
Citations in the corpus
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